Made this Tardis Doctor Who crayon art on a canvas! Just get a vinyl decal, stick it on your canvas, hold the crayon above the canvas and melt with a hair dryer to create the splatter. You can also rub the melted crayon on the canvas to create the thicker blobs of color. You want to make sure that you've covered the decal completely with your melted crayon. Wait for it to dry, then peel off the decal!